NTC01 Chronograph Features Intuitive interface with 128*64 OLED display Auto-calculate MAX, MIN, AVG speed, energy, and Joule/cm² The extra-large caliber of 36mm for different ammo from 4.5mm to 18mm Six ammo parameters can be stored for quick select on the F1 interface 99 testing data can be stored for analyzing the airsoft performance Tripod mounting hole and a mini tripod included for mounting on a camera tripod Auto-power off function while idled for some time or battery is low Powered by 4 x AAA batteries (batteries NOT included) or Micro USB (no battery charge function) Companion software for firmware upgrade & testing data view Calibratable IR sensor for more accurate detecting 120-3600RPM ROF (Rate of Fire) range 36MM (1.417IN) Diameter of Caliber 15M/S-400M/S Measurement Range of Muzzle Velocity
